Liquid (meth) acrylic syrup impregnation of a fibrous substrate and its manufacturing process, impregnation process of a fibrous substrate, composite material obtained after the polymerization of said pre-impregnated substrate

摘要

Liquid (acrylic) impregnating syrup of a fibrous substrate, said fibrous substrate being constituted by long fibers, said syrup being characterized in that it comprises: a) a (meth) acrylic polymer, b) a (meth) acrylic monomer, c) domains elastomeric consisting of macromolecular sequences of a flexible nature, of glass transition temperature below 0 ° C, determined by DSC, macromolecular sequences are not prepared from a diene, and are soluble in the (meth) acrylic monomer, said syrup having ( met) liquid acrylic a dynamic viscosity at 25 ° C comprised between 10 mPa · s and 10,000 mPa · s, preferably between 50 mPa · s and 5,000 mPa · s and advantageously between 100 mPa · s and 1,000 mPa · s.